**Code for the above figure;** 

 for i=1:2112  % (image rows)
        for j=1:2816  % (image cols)
             
            if contrastAdjusted(i,j)<110
                ff(i,j)= 1;
            else
                ff(i,j)=0;
            end
        end
    end
    
    imshow(ff);